myhdl_tristate.py

from myhdl import *

def top(sda, scl, sda_i, sda_o, scl_i, scl_o):
     """Simple I2C bi-dir converter.
     This example will break the I2C bi-directional signals into
     uni-dir explicit signals.
     """
     sda_d = sda.driver()
     scl_d = scl.driver()

     @always_comb
     def hdl():
         sda_i.next = sda
         sda_d.next = False if not sda_o else None

         scl_i.next = scl
         scl_d.next = False if not scl_o else None

     return hdl


def convert():
     clk = Signal(False)
     rst = Signal(False)
     sda = TristateSignal(True)
     scl = TristateSignal(True)
     sda_i = Signal(False)
     sda_o = Signal(False)
     scl_i = Signal(False)
     scl_o = Signal(False)

     toVerilog(top, sda, scl, sda_i, sda_o, scl_i, scl_o)
     toVHDL(top, sda, scl, sda_i, sda_o, scl_i, scl_o)

if __name__ == '__main__':
     convert()

is this code complete?